Abstract

Next generation structural silicone glazing

Highlights

  • Requirements for curtain walls in today’s building codes have been influenced by recent extreme wind events

  • It should be noted that the strain rate of the data used to generate the FEA material properties and the data used to generate the ASTM C1135 test results were prepared based on different strain rates; the FEA material properties were generated at 0.01 s-1 strain rate, while the ASTM C1135 test results were generated at 0.0167 s-1 strain rate

  • It should be noted that the strain rate of the historical data was generated at a different load rate than the strain rate of the FEA model

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Summary

Introduction

Requirements for curtain walls in today’s building codes have been influenced by recent extreme wind events. ASCE7-10’s design wind speeds and cladding pressures have increased significantly resulting in correspondingly larger material sizes and strength for sufficient structural capacity. Tall buildings in hurricane zones have cladding pressures that routinely exceed 6 kPa. Over the past several decades attachment of architectural glass to curtain wall framing has been successfully accomplished via use of structural silicone glazing (SSG). Architectural desire for aesthetically slender curtain wall framing sight lines prompted SSG designers to find a way to optimize the silicone joint. Physical test specimens of structural silicone material will be closely examined to establish structural behaviour that can be rigorously compared to computer modelling using hyper elastic theory. Full-scale performance mock-up testing of the new joint design has been executed to compare to predicted capacity of an advanced finite element analysis of the integrated glazing system

Structural silicone glazing yesterday and today
Results
A: Static Structural Maximum Principal Stress Type
A: Static Structural Maximum Principal Stress 2 Type
A: Static Structural Maximum Principal Stress 6 Type
Mock up to evaluate silicone deflections
Conclusion on how to use Next Generation SSG and incorporating a new design
Establishment of an accurate FEA model
Full Text
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